[patrickt]

OK, the "high amperage" wire path is BROWN from the 50 amp circuit breaker to one side of the amp gauge, RED from the other side of the amp gauge to the #1 always-hot post on the fuse block, YELLOW from the #1 post on the fuse block to the BATT terminal on the ignition switch, and WHITE from the ACC post back to the switched circuits on the fuse block. And yes, that circuit board makes up for an impossible-to-obtain wiper timing switch.